help needed for developing portable app

Hi all
i am a registered user of a closed source program called artrage. I tried to make a portable copy of the application. but it asks for registration key on every new computer. how can i get rid of entering registration key every time i change a comp.

also i am a beginner...so a more detailed guide would be of help. i used reg rap to create the portable version as written in README txt file.

waiting for the replies guys..pleade help

Regards
Ankur Kaul